SCXI 8-Channel
Isolation Amplifiers
SCXI-1125
SCXI-1120/SCXI-1120D
8 isolated channels
8 isolated channels
333 kS/s (any gain)
333 kS/s (any gain)
Programmatic gain per channel
Programmatic filter per channel
(4 Hz, 10 kHz)
Jumper selectable gain per channel
Jumper selectable filter per channel
(4 Hz, 10 kHz for SCXI-1120)
(4.5 kHz, 22.5 kHz for SCXI-1120D)
300 V working isolation
rms
per channel
250 V working isolation
rms
Automatic input zeroing
per channel
Signal inputs from ±2.5 mV to ±300 V
(1000 VDC with the TBX-1316)
Signal inputs from ±2.5 mV to ±250 V
(1000 VDC with the TBX-1316)
Driver Software
NI-DAQ
Application Software
LabVIEW
Windows 2000/NT/Me/9x
Mac OS (1120 only)
Measurement Studio
Lookout
Calibration Certificate Included (SCXI-1125 Only)
Module
Signal Compatibility
addition, the SCXI-1125 is CE
certified as double insulated,
±2.5 mV ±5 mV to ±250 mV ±1000 V 0-20 mA Thermocouple
EXPRESS
CODES
SCXI-1125
SCXI-1120
SCXI-1120D
✔
✔
–
✔✔✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
Category II, for 300 V
operational isolation.
of
rms
For information or to
buy products online,
visit ni.com/catalog
and enter:
Table 1. SCXI Module Compatibility
SCXI-1120, SCXI-1120D
Overview
The analog inputs of the 1120 Series consist of
eight isolated amplifiers. You can configure
each amplifier using jumpers for input ranges
scxi1120
scxi1120d
scxi1125
National Instruments offers three different 8-channel isolated analog
input modules for SCXI. These modules share a common architecture,
providing 250 V
to 300 V
of working isolation and lowpass from ±2.5 mV to ±5 V (SCXI-1120) or ±5 mV
rms
rms
filtering for each analog input channel. This architecture is ideal for to ±10 V (SCXI-1120D). With the SCXI-1327
amplification and isolation of millivolt sources, volt sources, 0 to high-voltage attenuator terminal block, the
20 mA, 4 to 20 mA, and thermocouples. Each module can multiplex input range is extended to ±250 V. With the
these eight channels into a single channel of the DAQ device, and you TBX-1316, the input range is extended to ±1000 VDC (680 V ). Each
add modules to increase channel count. These modules also offer channel also includes a lowpass filter that is jumper configurable for 4 Hz
rms
parallel mode operation.
or 10 kHz (SCXI-1120), or for 4.5 or 22.5 kHz (SCXI-1120D). Each channel
is individually isolated with a working common-mode voltage of 250 V
rms
Analog Input
between channels or channel to earth. In addition, the SCXI-1120 and SCXI-
SCXI-1125
1120D are CE certified as double insulated, Category II, for 250 V of
rms
The analog inputs of the SCXI-1125 consist of eight programmable
operational isolation.
isolation amplifiers. You can program each channel independently for
input ranges from ±2.5 mV to ±5 V. With the SCXI-1327 high-voltage Modes of Operation
attenuator terminal block, the input range is extended to ±300 V. With Multiplexer
the TBX-1316, the input range is extended to ±1000 VDC (680 V ).
In multiplexed mode, these modules multiplex all eight conditioned
rms
Each channel also includes a programmatic lowpass filter that you can
configure for 4 Hz or 10 kHz. With the SCXI-1125 you can perform
random scanning meaning you can scan any channel in any order.
Each channel is individually isolated with a working common-mode
signals, along with the optional temperature sensor reading provided
on the MTEMP line, onto channel MCH0 of the rear signal connector,
to which you can connect a single input channel of the DAQ device.
Furthermore, you can connect the multiplexed output of each
module using programmable switches to analog bus 0 of the SCXIbus
voltage of 300 V
between channels or channel to earth. In
rms
National Instruments 501
Tel: (512) 794-0100 • Fax: (512) 683-9300 • info@ni.com • ni.com
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